/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 */
package com.google.code.bigyang.util;

import java.nio.ByteBuffer;

public class ByteBufferUtil {

	private ByteBufferUtil() {
		
	}
	
	
	
	public static final void flip(ByteBuffer[] bufs) {
		if(bufs == null) {
			return;
		}
		for(ByteBuffer b:bufs) {
			if(b != null) {
				b.flip();
			}
		}
	}
	
	public static final void shrinkBuffer() {
		
	}
	
	public static final ByteBuffer expandBuffer(ByteBuffer buf, int incrementSize, boolean isDirect) {
		if(buf == null) {
			throw new IllegalStateException("ByteBuffer is null");
		}
		if(incrementSize <= 0) {
			return buf;
		}
		int capacity = buf.capacity();
		int newSize = capacity + incrementSize;
		return allocateByteBuffer(newSize, isDirect);
		
	}
	
	public static final ByteBuffer allocateByteBuffer(int size, boolean isDirect) {
		if(isDirect) {
			return ByteBuffer.allocateDirect(size);
		} else {
			return ByteBuffer.allocate(size);
		}
	}
	
	
}
